Battery drain even after shuttting down the phone. - Asus Zenfone Max Pro M2 Questions & Answers

Hey y'all. I got a teeny problem with my phone now.
A week ago i flashed LineageOS 16 to my phone. Downloaded some essential Foss apps and mods from Magisk. Everything was going fine.
The thing is, my battery is acting up.
My phone has a 5000MHz capacity and yesterday it had 68% of charge. I switched my phone off before going to sleep and now when i power it on again it shows 8%. This is the second time my battery's being drained after shutdown.

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[Q] Battery meter wonkiness

Hello all,
Having some strange issues with the battery level reading on my Xoom. I plugged it in yesterday after it died and was startled to notice that 15 minutes later it was reading 46%. I unplugged it, played with it for a while, and the meter seemed to be behaving normally, so when it got to about 40% I plugged it back in.
Now it's at 100%. It has been there for about 12 hours now including about 2 hours of use. Plugging it back in briefly while turned off, the LED indicator took the normal amount of time to show fully charged, so I don't think it's an issue with the battery itself. It generally takes me a few days to run my Xoom down completely, so I thought I would ask... has anyone experienced this before, and did it resolve itself after a full battery cycle?
Also, if it doesn't start reporting correctly on its own, what options do I have other than installing CWR and wiping battery stats? I've left it stock so far and I'd prefer to keep it that way.

[Q] Battery draining like crazy

Started last night after I updated a few play store apps. I put my phone in the charger and it was at 1% at the time. I got it up to about 17% and it just stopped charging. I thought it was just the charger (official LG) so I switched it out and grabbed another (Touchpad charger) and it started charging again.
Skip to the morning about 6-7 hours later. Phone is really hot, 75% battery and not charging even though it's still plugged in. First instinct, restart it. At this point I had to get ready for work. When I got to work I let it slowly drain out and waiting about 30 minutes after it died before charging it, thinking that the battery needed a calibration. So I charged it up to about 35% and had to go for lunch. By the time I get back in a little over an hour it's at like.. 10% I think which is pretty odd for that amount of time.
Anyway I let it drain out again, at this point I also reflashed my current rom (dirty wipe), installed betterbatterystats and another app to check wake locks. I also installed greenify and froze 2-3 things. Drain is still happening although it might have slowed a little bit.
Fast forward to home, I have now completely wiped my phone and flashed the latest stable CM on it (10.1.2). In about 40 minutes I went from 25% - 15%. I DID NOT FLASH GAPPS YET. This is running barebones with literally no apps, no syncing (no gapps, no google signin) with WiFi on. I'm thinking the fast drain has to do with A) Uncalibrated battery (I haven't hit 100% in about 48 hours now almost) or B) battery is dead (or really bad).
TL;DR Battery is draining super fast, no [excessive] wake locks, dirty flashed once, clean wiped once. Drain still happening. All in a period of less than 24 hours. Is this a hardware issue?
have you tried a custom kernel?? .. try Franco's i think it's the best for battery life.
enviii said:
Started last night after I updated a few play store apps. I put my phone in the charger and it was at 1% at the time. I got it up to about 17% and it just stopped charging. I thought it was just the charger (official LG) so I switched it out and grabbed another (Touchpad charger) and it started charging again.
Skip to the morning about 6-7 hours later. Phone is really hot, 75% battery and not charging even though it's still plugged in. First instinct, restart it. At this point I had to get ready for work. When I got to work I let it slowly drain out and waiting about 30 minutes after it died before charging it, thinking that the battery needed a calibration. So I charged it up to about 35% and had to go for lunch. By the time I get back in a little over an hour it's at like.. 10% I think which is pretty odd for that amount of time.
Anyway I let it drain out again, at this point I also reflashed my current rom (dirty wipe), installed betterbatterystats and another app to check wake locks. I also installed greenify and froze 2-3 things. Drain is still happening although it might have slowed a little bit.
Fast forward to home, I have now completely wiped my phone and flashed the latest stable CM on it (10.1.2). In about 40 minutes I went from 25% - 15%. I DID NOT FLASH GAPPS YET. This is running barebones with literally no apps, no syncing (no gapps, no google signin) with WiFi on. I'm thinking the fast drain has to do with A) Uncalibrated battery (I haven't hit 100% in about 48 hours now almost) or B) battery is dead (or really bad).
TL;DR Battery is draining super fast, no [excessive] wake locks, dirty flashed once, clean wiped once. Drain still happening. All in a period of less than 24 hours. Is this a hardware issue?
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try charging once from a computer's usb port. somehow this fixed my problems a couple months ago i have no idea why though but give it a shot
Ahmad H Storm said:
have you tried a custom kernel?? .. try Franco's i think it's the best for battery life.
Click to expand...
Click to collapse
I flashed Franco M3 last night before going to bed. I'm going to see how today goes, but right now I can tell you I don't think it fixed anything.
Zainiak said:
try charging once from a computer's usb port. somehow this fixed my problems a couple months ago i have no idea why though but give it a shot
Click to expand...
Click to collapse
I'll give it a shot whenever it gets low battery today.
you can' really judge franco kernel until a few battery cycle as it need to settle with your ROM.

Strange battery discharge issue.

I recently purchased a used S4 through Swappa from XDA user @disasp6. When the phone arrived, the battery was fully discharged. I let my wife use the phone a couple of days while hers was being repaired, and she experienced the battery running completely down and needing a recharge before the end of the day after being 100% in the morning. I then turned the phone off and put it aside for over a week and when I tried to turn it on, the battery was dead.
I tried a test, charging the battery to 100% and pulling the battery out of the phone for 24 hours. The battery retained it's charge. It did lose just a little bit of charge in a 24 hour period, but I was able to top it off with about 10 minutes of charging. I then left it in the phone for 24 hours with the phone turned off, and at the end of 24 hours the battery was fully discharged.
I've never seen a problem like this. Any phone I have ever owned has retained it's full charge when turned off. The phone is running safestrap with Goldfinger 9.0 XXUGNK4. It seems to be running normally. I haven't seen any issues with the phone firmware or its operation in the limited time I have been using it.
Does anyone have any idea what the cause of this could be, or how to troubleshoot the issue?
creepyncrawly said:
I recently purchased a used S4 through Swappa from XDA user @disasp6. When the phone arrived, the battery was fully discharged. I let my wife use the phone a couple of days while hers was being repaired, and she experienced the battery running completely down and needing a recharge before the end of the day after being 100% in the morning. I then turned the phone off and put it aside for over a week and when I tried to turn it on, the battery was dead.
I tried a test, charging the battery to 100% and pulling the battery out of the phone for 24 hours. The battery retained it's charge. It did lose just a little bit of charge in a 24 hour period, but I was able to top it off with about 10 minutes of charging. I then left it in the phone for 24 hours with the phone turned off, and at the end of 24 hours the battery was fully discharged.
I've never seen a problem like this. Any phone I have ever owned has retained it's full charge when turned off. The phone is running safestrap with Goldfinger 9.0 XXUGNK4. It seems to be running normally. I haven't seen any issues with the phone firmware or its operation in the limited time I have been using it.
Does anyone have any idea what the cause of this could be, or how to troubleshoot the issue?
Click to expand...
Click to collapse
I'd say first thing to do is wipe and start from stock. See if that fixes anything.
Sent from my SGH-I337
I flashed back to stock NJ4, rooted and installed Better Battery Stats. I fully charged the phone and left it unplugged over night. After 8 hours of total inactivity, the battery had discharged from 100% to 60%, and Bettery Battery Stats indicated that the phone was in Deep Sleep 100% of the time since unplugged. There were 0% partial wakelocks of any kind. In my thinking, this verifies that the issue is hardware related. Does anyone have any thoughts on this?
I would think idle drain with 100% Deep Sleep should produce somewhere around 0.5% per hour drain, and certainly less than 1%. I'm not familiar with the S IV so I'm not sure the exact number. Can anyone verify this?

Sudden battery issues - stops charging anywhere between 77 and 91, sudden drops

I've owned my Note 4 since October 2014 and it's been working solidly since. Last Thursday, out of nowhere, I noticed that from a 14% charge, it suddenly dropped to 4%. I immediately scrambled for a charger and charged it back up to 100%. On Friday, I charged my battery normally again. Charging finished at 11 AM but the drain was abnormally high. My phone was warm to the touch and battery was dead in 4 hours. I was using the phone normally throughout that time, 4g on, location services/bt off, screen off for the most part. I ran OS monitor to see whether any app was locking up the CPU, but, as expected, the main CPU users were Android System and Android OS.
On Saturday, I charged the phone to full again, disconnected around 4 pm. Being that I was home, both wifi and 4g were off. Battery discharged normally, and was only down to 30% on Monday morning.
On Monday, I noticed that battery dropped from 21% straight to 11% straight to 4% in a few seconds. The drain from 4 to 3 to 2% was decent (few minutes of screen on time, on viber), then the phone shut off. I tried to charge the battery with the device powered off, but noticed that the phone simply stopped charging at 80%. I thought that was an abnormality. I tried wiping the system and app caches, but the problem persisted and drain still felt pretty fast. Tuesday night, the phone stopped charging at 91%, staying at the same level for 40 minutes before I gave up and unplugged.
My friend had purchased a fake OEM Note 4 battery and allowed me to try the drain/charge process using his battery to troubleshoot. When I first plugged his battery into my phone, the drain was high at about 1 percent per minute. When I tried to charge the battery, the charge level would not go beyond 90%. I switched on safe mode, but the battery did not charge any further either. I felt by then that something was definitely wrong with my phone. When I restarted the phone to get out of safe mode, though, it suddenly started charging again and hit 100%. With regular use, the fake battery gave me 16 hours of power, which I thought was relatively decent. Alas, when I started charging it again, it stopped charging at 77%. Battery Monitor Widget showed 0 mA flowing into the phone at the time, though the battery indicator in the status bar showed the lightning bolt.
I took out the fake battery and put in my original. It is now charging up normally, but I expect charging to stop before I hit 100%.
If anyone could provide possible explanations for what could be going on and/or other troubleshooting tips to try, I would really appreciate it. A factory reset would be my last recourse.
Thank you very much!
EDIT: My battery went all the way up to 100% this time. But it's the same one that got stuck (at 80% then at 91%) twice in the past.
I'm using two different Samsung chargers and different cords, by the way, and blew out the port with air prior to attempting to charge the fake battery that still stopped at 77%.
I had the same issue, took it to Samsung and they replaced the battery, it has been okay since that
tigsandmitch said:
I had the same issue, took it to Samsung and they replaced the battery, it has been okay since that
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Really? I was ready to write off my battery and just buy a replacement, but what was weird was that even the newish fake battery wouldn't charge fully. That's what made me worried that it's my phone that's the problem.
It'd be great if this could be as simple as a battery problem.

Battery percentage issue on z17s

Hi.
Yesterday I was using my Nubia z17s as always and before going to bed I decided to charge it, since battery was at around 20%.
When I connected the charger, the screen went off and it didn't wake up, no matter what I did, although I could feel the fingerprint scanner vibration when I used any of the registered fingers. So I decided to hard reboot the phone by keeping the power button pressed.
To my surprise, when the phone booted again, the battery percentage showed 3%. I left it charging overnight and now it's working but the battery percentage is stuck on 3%. I'm pretty sure it's more than that, since I've been using the phone for more than 6 hours and the battery percentage hasn't dropped a bit, and the phone is working (I've made an received a few calls).
A guy at work suggested letting the battery drain completely until the point the phone shuts itself down, and then charging the phone up to 100% while off, so the battery is calibrated and the percentage is fixed. But I've always heard that it's not a good idea to let a battery drain so much. Another problem is that I fear not being able to charge the phone again once the battery gets below 3%.
Any ideas? The phone is running latest Mokee 9 Premium.
Thanks in advance.
Remove "batterystats.bin" in the System folder
Tomcar said:
Remove "batterystats.bin" in the System folder
Click to expand...
Click to collapse
I had already tried that. But deleting that file just resets the battery usage statistics. It has nothing to do with the battery percentage
It seems to me that you will have to make a full data backup and perform a factory reset.
ps and which firmware in use?
Hi, I forgot replying.
I finally got the phone up and running again, and the issue seemed to be firmware related.
I was running the phone on Android Pie based Mokee ROM. I finally let the phone discharge until it shut down and charged it while off. Battery got up to 100% and the phone seemed to work fine. But, a few weeks later, something similar happened again, so I reverted to the stock firmware (still stuck at Android 7.1.1) and the battery issues went away.
I recently tested the Android 10 based Mokee and found that it reports battery level very differently than the stock firmware. Before flashing TWRP and the Mokee ROM, the phone was showing 88% battery left. Just after booting Mokee, the phone had apperently dropped to 78% and I also felt quite a huge battery drain. And it had only taken me around 5 minutes to install the recovery and firmware. So I guess the Mokee firmware doesn't handle the battery very well on Nubia z17s. It's a pity, since all the rest works very well, and I quite liked the Android 10 experience. On the other side, I was unable to make Magisk work under Android 10, and Google Pay is a must for me now, so I once again went back to stock firmware.

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